Purge queue functionality about azure-service-bus-java

[yvgopal]

Not explicitly available. But create a queue client in ReceiveAndDelete mode and don't do anything in the onMessage() handler. It will take sometime, but will do the job. Deleting all messages in a queue is fundamentally not supported by a broker. It supports only SEND and RECEIVE, not DELETE. But you can always delete the queue and recreate it.

[sharadholani]

To delete all messages in the queue , I am polling the queue till I receive no message and then call complete on each of those messages.
I am using MessageReceiver objects and will not be able to use QueueClients.

If any message has been locked by some receiver during this purge queue operation , it will never be received and hence , not be completed.

What can I do in this scenario ?

[yvgopal]

There is a receive mode called 'ReceiveAndDelete' which doesn't require client to complete the messages. A message is deleted on the queue before it is handed over to the client. That is faster than PeekLock receive followed by complete operation, if you need to purge the queue. When you are creating a receiver, you can specify 'ReceiveAndDelete' as the receive mode.

You can't do anything in that scenario, except waiting for the locked message to be completed by whatever client locked it or for the lock to expire and the message to be received by your purging client.